Loudspeaker



FIG. 1 is a front, top, left side perspective view of a loudspeaker showing my new design;

FIG. 2 is a rear, top, right side perspective view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a left side view thereof, the right side view being the same as the right side view;

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view thereof.

Broken lines illustrate portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a loudspeaker, as shown and described. 